this forum is quite in lock down, pardon the pun, even the latest update isn’t reflected in the sticky… let it live!
but i believe because spectralayers, creates a file, it doesn’t affect performance much. it pre-renders, to use this phrase.
every time you clean, it is updated. it has history files of course, that i quess are, i don’t know what to guess.
every process, or plugin takes a performance draw. but me thinks spectralayers is quite efficient. i can’t judge it for your specific situation.
try it!